Anything from Amember to Quickbooks is fair game here. In the hosting industry, iDevAffiliate and Plesk Billing were the pieces of software we would have paid a lot of money to have someone else deal with. The more niche and more complex/annoying/frustrating the software, the better! Even if the software company offers free installation, you can make hundreds or thousands of dollars training business owners or their employees on its usage. Focus on one piece of software and become the trusted expert. Create videos and tutorials using screencast software like Camtasia to increase your profitability; this may also lead into a niche product that you can sell. (Amember offers free installation , but it took my boyfriend and I over 10 hours to configure it properly. That's definitely something I would outsource next time!)
